<template>
  <div v-if="total" class="todo-footer">
    <!-- <label>
      <input type="checkbox" :checked="isAll" @click="checkAll">
    </label> -->
    <span>
      <span>已完成{{doneTotal}}</span> / 全部{{total}}
    </span>
    <button class="btn btn-danger" @click="clearAll">清除已完成任务</button>
  </div>
</template>

<script>

export default {
  name: 'TodoFinish',
  props:["todos","checkAllTodo","clearAllDone","saveTodoJson"],
  computed:{
    isAll(){
      return this.total === this.doneTotal
    },
    total(){
      return this.todos.length
    },
    doneTotal(){
      return this.todos.reduce((pre, current)=>{        
        return pre+(current.isDone?1:0);
      } ,0) ;
    }
  },
  methods:{
    checkAll(e){
      console.log(e);
      this.checkAllTodo(e.target.checked);     
    },
    clearAll(){
      
      if(confirm("确认删除全部已完成任务？"))
        this.clearAllDone();
    }
  }
}
</script>

<style scoped>
.todo-footer{
  height: 40px;
  line-height: 40px;
  padding-left: 6px;
  margin-top: 5px;
}
.todo-footer label{
  display: inline-block;
  margin-right: 20px;
  cursor: pointer;
}

.todo-footer label input{
  position: relative;
  top: -1px;
  vertical-align: middle;
  margin-right: 5px;
}

.todo-footer button {
  float: right;
  margin-top: 5px;
  margin-left: 5px;
}
</style>
